Territory



(No Mot i el.) I

J. A. TUPPER.

ELECTRIC GUT-OFF. No. 286,158. Patented 001;. 2, 1883.

UNITED STATES PATENT OFFICE.

ELECTRIC SPECIFICATION forming part of Letters CUT-OFF.

Patent No. 286,158,dated October 2, 1883.

Application filed July 19, 1883. No model.)

To all whom it may concern.-

Be it known that I, JOHN A. TUPPER, a citizen of the United States, residing at Salt Lake City, in the county of SaltLake and Territory of Utah, have invented certain new and useful Improvements in Electric Cut-O'Ifs; and I do declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to an electric cut-off for electric lights; and iteonsists in the c011- struction and combination of devices, as hereinafter more fully described and claimed.

I11 the annexed drawings, illustrating the invention, Figure 1 is a side elevation of an ordinary gas-tube provided with my improvements, whereby it is adapted for use as an electric cut-off for an electric light. Fig. 2 is a longitudinal section of the same, and Fig. 3 is a bottom view of the tap and connections with the thumb-piece removed.

Like letters designate like parts in the several views.

A is an ordinary gas tube or bracket of any suitable construction. Instead of having the ordinary key or plug, however, this tube is fitted with a bushing, B, of norreouducting materialsuch as rubber or other suitable substaucethrough which bushing is passed a tap or cut-off consisting of a screw-bolt, O, to the lower threaded end of which is attached an adjustable thumb-piece, D, similar to those used in construction of gas-burners. This thumb-piece must be made of some good con ducting material. A washer, E, surrounds the bolt 0, and rests on the bushing B. This washer supports a spring, F, that may be made of rubber or of coiled wire, as shown, the spring surrounding the upper end of the bolt 0 beneath its head, and being inclosed in a ferrule, G, that is held between the washer and the head of the bolt.

H is a continuous electric wire that is in closed in the tube A, so as to pass around the bushing B, and I is a brokenor interrupted wire, the inner ends of which are passed into the non-conducting bushing B, and down to the lower end of the same, as shown in Fig. 2.

The thumb-piece D is provided on one side or edge with a stud or pin, K, that is adapted to engage with and pass over a beveled projection, flange, or rim, L, that is formed on the lower side of the tube A, when the thumb piece is turned. It will be seen that when the thumb-piece D is turned to the position shown in Fig. 2that is, with its stud K away from the projection Lthe spring F, eX- panding against the head of the bolt 0, will draw the thumb-piece D up against the lower end of the bushing B in contact with the ends of the wires I I, that are embedded therein, and the thu1nb-piece being composed of conducting material, the circuit is consequently completed. If, however, the thumb-piece D should be turned to the position shown in Fig. 1, with its stud K resting on the projection L, the thumbpiece will be drawn away from the wires I I, so as to break the circuit and extinguish the light. When the thumb piece is moved to this position, the bolt G is also drawn down, thus compressing the spring F, the tension of which will again carry the thumb-piecc into contact with the wires I I, when said thumlrpiece is turned back. By connecting the bolt 0 and thumb-piece I) with a screw-thread it is obvious that the thumb-piece may be readily adjusted as required.

This device can be readily applied to the ordinary gas-fixtures in a building, the wires being made to run through the pipes, and the pipes and the old fixtures thus utilized for the incandescent electric light.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a cut-off for electric lights, the combination, with the wires H I, of the tube A, having projection L, the non-conducting bushing B, and the thumb-piece D, having stud K, substantially as described.

2. In a cut-off for electric lights, the combination of the tube A, having projection L, the non-conducting bushing B, screw-bolt C, spring F, ferrule G, thumb-piece D, having stud K, the continuous wire H, and the broken wire I, having its ends inserted into and flush with the lower end of the bushing, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

\Vitnesses: JOHN .A. TUPPER.

E. W. Wnsrcorr, M. M. KAIGHN.

ICC 

